Modifier keys not working properly in Photoshop CC 2018

Merged

It seems like the update to Photoshop CC 2018 has caused a few problems. Aside from the annoying ones (those tooltip help videos are killing me), it seems like modifier keys (shift, alt) aren't working right for me anymore.

In 2017, I used to be able to hold alt and press the arrows to make a copy of the layer. That no longer works for some reason. I can hold alt and drag the mouse, but that doesn't help me at all. I'm working on a grid, and everything needs to line up, so I use pixel counts to do so (in order to properly size mockups for our developers). Now I need to copy the layer by alt-dragging the mouse, then move it back to it's original position, then use the arrows to move it. Why was this changed?

Along the same lines, I often use shift-arrows to move things by 10 pixels. Half the time this works, 25% of the time it doesn't move at all, and 25% of the time it moves by 1 pixel instead. All while I'm still holding the shift key (not even letting go in between!). I use this function hundreds of times a day. These issues have slowed down my production by half!

Same Problem here! I was setting up my freshly bought Logitech G13 and had a few sleepless nights trying to find out why shortcuts wouldn't work with it. Until it hit me, that "maaaaaybeeee".... Looks like I need to revert to 2017 Version until there is a fix.